Lantronix SM8TAT2SA-DC User manual

SM8TAT2SA-DC
DC-Powered Smart Managed Gigabit Ethernet PoE+ Switch
(8) 10/100/1000Base-T Ports + (2) 100/1000Base-X SFP Slots
Install Guide
Part Number 33814
Revision C August 2023

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Intellectual Property
© 2022, 2023 Lantronix, Inc. All rights reserved. No part of the contents of this publication may be transmitted
or reproduced in any form or by any means without the written permission of Lantronix.
Lantronix and Lantronix Spider are registered trademarks of Lantronix, Inc. in the United States and other
countries.
Patented: https://www.lantronix.com/legal/patents; additional patents pending.
Warranty
For details on the Lantronix warranty policy, go to http://www.lantronix.com/support/warranty.
Contacts
Lantronix Corporate Headquarters
48 Discovery, Suite 250
Irvine, CA 92618, USA
Toll Free: 800-526-8766
Phone: [phone]
Fax: [phone]
Technical Support
Online: https://www.lantronix.com/technical-support/
Sales Offices
For a current list of our domestic and international sales offices, go to www.lantronix.com/about/contact.
Revision History
Date
Rev.
Comments
5/12/20
A
Initial SM8TAT2SA-DC release at HW v1.01, FW v1.02.1463, and PoE FW v 208-211.
7/28/20 B
FW v1.02.1471: fix Auto-Logout timeout function. FW v1.02.1474: fix IP Gateway setting
issue. Update regulatory compliance information and DoC. FW v 1476: fix timeout and
restore. FW v1.02.1409: change the feature name from “Soft Reboot” to “Always on PoE”.
Add grounding information.
8/25/23 C
v1.04.0095: Add SMTP feature and Maximum Frame Size (MTU) setting per System in Web
UI Port Config. Change "Non-stop PoE" to "Always-On PoE". Support "copy startup-config
to running-config" in Replace mode. Add timezone in syslog time format, add Always-On
PoE in mib, and add and modify API commands. Fix issues with LLDP neighbor mgmt
address and PoE Mode field issues. Initial Lantronix re-brand. Add IEEE 802.3bt Power
Input Ripple and Noise Specification. Add PS 25104 UK DoC. Update contact information.
Allow FW to upgrade from v1.02.1261 to v1.04.0059 in one step. Add new trap OID for
ZTPOnboardtrap and add sysObjectID as third item in ZTP trap. Update ZTP procedure.
Add self-signed certificate changes and add DHCP client mode option 66/67. Update to
TLSv1.2 ciphers and add PoE Status to the Device Telemetry Data. See the Release Notes.

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Disclaimer
All information contained herein is provided “AS IS.” Lantronix undertakes no obligation to update the information
in this publication. Lantronix does not make, and specifically disclaims, all warranties of any kind (express, implied
or otherwise) regarding title, non-infringement, fitness, quality, accuracy, completeness, usefulness, suitability or
performance of the information provided herein. Lantronix shall have no liability whatsoever to any user for any
damages, losses and causes of action (whether in contract or in tort or otherwise) in connection with the user’s
access or usage of any of the information or content contained herein. The information and specifications
contained in this document are subject to change without notice.
Operation of this equipment in a residential area is likely to cause interference, in which case the user, at his or
her own expense, will be required to take whatever measures may be required to correct the interference.
Note: This equipment has been tested and found to comply with the limits for Class A digital device pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with this user guide, may cause interference
to radio communications. Operation of this equipment in a residential area is likely to cause interference, in which
case the user will be required to correct the interference at his own expense.
User Information
Class A Equipment (Broadcasting and communication equipments for office work).
Seller and user shall be noticed that this equipment is suitable for electromagnetic equipments for office work
(Class A) and it can be used outside home.
Changes or modifications made to this device that are not explicitly approved by Lantronix will void the user's
authority to operate this device.

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Contents
Product Description ....................................................................................................................................................6
About This Manual......................................................................................................................................................6
Ordering Information...................................................................................................................................................6
Related Documentation ..............................................................................................................................................6
Application Example ...................................................................................................................................................7
Features......................................................................................................................................................................7
PoE Features..........................................................................................................................................................8
Device Management System (DMS) ......................................................................................................................8
Software Features ..................................................................................................................................................8
Specifications..............................................................................................................................................................8
Software Feature Descriptions ................................................................................................................................ 10
Front and Back Panels ............................................................................................................................................ 13
Front Panel .......................................................................................................................................................... 13
Back Panel........................................................................................................................................................... 13
LED Descriptions ................................................................................................................................................. 14
System LED ..................................................................................................................................................... 14
Mode LEDs ...................................................................................................................................................... 14
Port Status LEDs ............................................................................................................................................. 14
MODE/RESET Button...................................................................................................................................... 16
Installation................................................................................................................................................................ 17
Package Checklist ............................................................................................................................................... 17
Rack Mount Safety Instructions........................................................................................................................... 17
Rack Mount Dimensions...................................................................................................................................... 18
Rack Mounting..................................................................................................................................................... 19
Wall Mounting ...................................................................................................................................................... 19
Mounting the Switch on Desk or Shelf................................................................................................................. 20
Grounding ............................................................................................................................................................ 20
SAFETY: Equipment Using -48V DC Power Supplies .................................................................................... 22
Ethernet Interface Connecting (RJ45 Ethernet) .................................................................................................. 23
PoE Deployment Environments A and B............................................................................................................. 24
IEEE 802.3bt Power Input Ripple and Noise Specification ................................................................................. 24
Ethernet Interface Connecting (Fiber, SFP) ........................................................................................................ 25
Console Connection ............................................................................................................................................ 26
Power Supply Warnings & Cautions !!..................................................................................................................... 27
Optional Power Supplies ......................................................................................................................................... 27
Power Supply Specifications ............................................................................................................................... 27
25105 Industrial DIN Rail Mounted Power Supply .............................................................................................. 28
25104 Industrial DIN Rail Mounted Power Supply .............................................................................................. 29
Power Supply Mounting Instructions ................................................................................................................... 30
Power Supply Installation .................................................................................................................................... 31
Connecting Power ............................................................................................................................................... 32
Connect Terminals to DC Power Source......................................................................................................... 32
Initial Switch Configuration ...................................................................................................................................... 33

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Initial Switch Configuration via Web Browser ...................................................................................................... 33
Connect the Switch to Your Windows 10 PC ...................................................................................................... 34
Initial Switch Configuration via CLI ...................................................................................................................... 34
Troubleshooting ....................................................................................................................................................... 35
Troubleshooting PoE Problems........................................................................................................................... 36
Box Label and Device Label ................................................................................................................................ 37
Record Device and System Information .............................................................................................................. 37
User Information .................................................................................................................................................. 38
RoHS, WEEE, and Environmental Programs.................................................................................................. 38
Declaration of Conformity .................................................................................................................................... 39
PS 25104 UK Declaration of Conformity ............................................................................................................. 40

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Product Description
The Lantronix SM8TAT2SA-DC smart managed GbE PoE+ switch is the next-generation Ethernet switch offering
powerful L2 features with better functionality and usability. It delivers the cost-effectively business and transports
Ethernet services via fiber or copper connections.
The SM8TAT2SA-DC delivers 8 (10M/100M/1G) RJ45 with 8 PoE+ (supports 802.3 at/af and total up to 130W)
ports and 2 GbE SFP ports. The SM8TAT2SA-DC provides high hardware performance and environment
flexibility for SMBs and Enterprises. This DC-powered switch provides a cost-effective solution for power and data
connectivity in a Service provider environment with +52 to +54VDC or -52 to -54VDC input.
The embedded Device Managed System (DMS) features make it easy to use, configure, install, and troubleshoot
in video surveillance, wireless access, and other SMB and Enterprise applications. The SM8TAT2SA-DC is ideal
to deliver management simplicity, better user experience, and lowest total cost of ownership.
About This Manual
This manual describes how to install, configure, and troubleshoot the switch, including how to:
•Install, connect, and power the switch
•Check switch status by reading the LED behavior
•Reset the switch or to restore the switch to factory defaults
•Use a Web browser or the CLI to initially configure the switch
•Troubleshoot the switch
Ordering Information
SKU
Description
SM8TAT2SA-DC
Smart Managed Switch, 8-Port Gigabit PoE+, 2-Port 100/1000 SFP; DC powered; +52 to
+54VDC or -52 to -54VDC. Includes 19” rack mount brackets.
25105
Optional Industrial DIN Rail Mounted Power Supply – order separately. Input: 85-264 VAC,
124-370 VDC. Output: 48~55 VDC, 2.5A, 120 Watts.
25104
Optional Industrial DIN Rail Mounted Power Supply – order separately. Input: 85-264 VAC,
124-370 VDC. Output: 48 ~ 55 VDC, 5A, 240 Watts.
SFPs
See the full line of Lantronix at our SFP webpage – order separately.
RMSM8-02
23″ Rack Mount Kit
Related Documentation
Visit the Lantronix Web site at www.lantronix.com/support/documentation for the latest documentation and the
following additional documentation. Note that this manual may provide links to third party websites for which
Lantronix is not responsible.
These manuals give specific information on how to install and operate switch functions:
•SM8TAT2SA-DC Quick Start Guide (33813)
•SM8TAT2SA-DC Install Guide (33814, this manual)
•SMxxTAT2SA Web User Guide (33717)
•SMxxTAT2SA CLI Reference (33718)
•SMxTAT2SA Unified API User Guide (33825)
•Release Notes (version specific)

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Application Example
The SM8TAT2SA-DC is used in applications such as:
•IP surveillance, supplying power and data to IP cameras
•Connecting and remotely powering wireless access points
•Monitoring/managing attached powered devices from various vendors
Features
•IPv6 Access Management
•Support Jumbo Frame up to 9K bytes
•Authentication – RADIUS, TACACS+
•DHCP Relay, DHCP Snooping, DHCP Server
•L2/L3/L4 ACLs Support MAC ACL, IP standard/extended ACL
•LLDP (Link Layer Discovery Protocol)
•IEEE 802.3az Energy Efficient Ethernet (EEE)
•IP Source Guard, Port Security
•Syslog
•Fanless Design
•SMTP (Simple Mail Transfer Protocol) client
•Single 48V-54VDC input via Terminal Block
•Commercial operating temperature: 0°C to +50°C
•PoE Budget: 130 Watts
•Optional Power Supplies: Lantronix 25105, 25104 (sold separately)
•CE/FCC/UL/cUL for EMI and Safety compliance
•Lifetime Warranty

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PoE Features
•Compliant with IEEE 802.3at PoE+
•Compliant with IEEE 802.3af PoE
•PoE configuration
•Auto Power Reset (APR)
Device Management System (DMS)
•Graphical Monitoring – Topology view, Floor view, Map view
•Traffic Monitoring
•Troubleshooting – Network diagnostic, protection mechanism, performance and link management
Software Features
•Management: Web Management, SNMP V1/V2c/V3, Telnet, CLI
•Port Trunk: Supports IEEE 802.3ad port trunk with link aggregation control protocol (LACP) and static
trunk
•Multicast: Support IGMP Snooping V1/V2, MVR, MLD Snooping V1/V2
•Quality of Service: Supports 8 hardware queues. Strict priority and WRR, Ingress policer, Egress shaping
and per port rate limiting
•Spanning Tree: Supports IEEE 802.1s MSTP, IEEE 802.1w RSTP and IEEE 802.1D STP Compliant
•VLAN: Port Based VLAN, IEEE 802.1Q tag based, up to 4k VLAN entries, QinQ, MAC based VLAN,
Private VLAN
•Firmware Update through TFTP and HTTP
Specifications
Port Configuration
Total Ports RJ45 (10M/100M/1G) Uplinks (100M/1G) Telnet
SM8TAT2SA-DC = 10
8
2 SFP
Via any RJ45 port
Hardware Performance
Model
Forwarding
Capacity (Mbps)
Switching
Capacity (Gbps)
Mac Table
(K)
Jumbo Frames
(Bytes)
SM8TAT2SA-DC
14.88
20
8
9216
Environmental Range
Operating Temperature Storage Temperature Operating Humidity Altitude
Fahrenheit Centigrade Fahrenheit Centigrade 10% to 90% non-
condensing
Feet Meters
32 to 122⁰ 0 to 50⁰ -4 to +158⁰ -20 to +70⁰ < 10000 <3000

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Dimensions, Weight, Mounting
Dimension (WxHxD) Weight
Mounting Type
Millimeters Inches Kilograms Pounds
220x 44x 242 8.6x 1.7x 9.5
1.49 Kg. w/o Pkg.
1.90 Kg. w/Pkg.
3.30 Lbs. w/o Pkg
4.20 Lbs. w/Pkg.
19’’ Rack Mount
Voltage and Frequency
Power Supply
DC Operating Range +52 to +54VDC or -52 to -54VDC
Power Supplied
With PoE
PoE af/at mode: 48V (PoE functions)
PoE at/af mode: <48V (PoE does not function)
Without PoE
System functions at 39V
System fails at less than 39V
Cold boot 40V
MTBF
SM8TAT2SA-DC
GB, GC - Ground Benign, Controlled 25°C
674,242 Hrs.
GB, GC - Ground Benign, Controlled 50°C
290,347 Hrs.
Certifications
Regulatory Compliance
EMS
European Standard EN 55035:
IEC 61000-4-2: Electrostatic discharge, Contact 4KV/ Air 8KV.
IEC 61000-4-3: Radiated, RF electromagnetic fields (not in close proximity).
IEC 61000-4-4: Electrical Fast Transient, DC 1KV, RJ45 0.5 KV.
IEC 61000-4-5: Surge immunity, DC common mode 2KV, differential mode 1KV. RJ45
online 1KV.
IEC 61000-4-6: Conducted Disturbances immunity, 3V/m.
IEC 61000-4-8: Power frequency magnetic field immunity.
IEC 61000-4-11: Voltage dips.
EMI FCC Part 15 Class A
Safety CE, LVD, UL/cUL Listed
Radiated and
Conducted Emissions
(from CE EMC
Report)
European Standard EN 55032 Class A
Australian Standard AZ/NZS CISPR 32 Class A
Radiated and
Conducted Emissions
(from FCC EMI
Report)
ANSI C63.4:2014 with FCC Method 47 CFR Part 15; Subpart B, Class A Digital Device,
CISPR PUB.22 and Canada Standard ICES-003 Issue 6, Class A
Harmonics European Standard EN 61000-3.2

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Voltage Fluctuations European Standard EN 61000-3.3
Software Feature Descriptions
Layer 2 Switching
Spanning Tree
Protocol (STP)

Standard Spanning Tree 802.1d
Rapid Spanning Tree (RSTP) 802.1w
Multiple Spanning Tree (MSTP) 802.1s
Trunking

Link Aggregation Control Protocol (LACP) IEEE 802.3ad
Static aggregation
VLAN
Supports up to 4K VLANs simultaneously (out of 4096 VLAN IDs).
Port-based VLAN; 802.1Q tag-based VLAN; Protocol based VLAN; IP subnet-based
VLAN; Private VLAN Edge (PVE); MAC-based VLAN; Q-in-Q (double tag) VLAN;
GARP VLAN Registration Protocol (GVRP)
DHCP Relay

Relay of DHCP traffic to DHCP server in different VLAN

Works with DHCP Option 82
IGMP v1/v2
Snooping
IGMP limits bandwidth-intensive multicast traffic to only the requesters. Supports 1024
multicast groups.
IGMP Querier
IGMP querier is used to support a Layer 2 multicast domain of snooping switches in the
absence of a multicast router
IGMP Proxy
IGMP snooping with proxy reporting or report suppression actively filters IGMP packets
in order to reduce load on the multicast router
MLD v1/v2
Snooping
Delivers IPv6 multicast packets only to the required receivers
Multicast VLAN
Registration
MVR uses a dedicated manually configured VLAN, called the multicast VLAN, to forward
multicast traffic over Layer 2 network in conjunction with IGMP snooping
Security
Secure Sockets
Layer (SSL)
SSL encrypts the http traffic, allowing advanced secure access to the browser-based
management GUI in the switch
IEEE 802.1X

IEEE802.1X: RADIUS authentication, authorization and accounting, MD5 hash, guest
VLAN, single/multiple host mode and single/multiple sessions
Supports IGMP-RADIUS based 802.1X

Dynamic VLAN assignment
Layer 2 Isolation
Private VLAN Edge
PVE (also known as protected ports) provides L2 isolation between clients in the same
VLAN. Supports multiple uplinks
Port Security Locks MAC addresses to ports, and limits the number of learned MAC address
IP Source Guard Prevents illegal IP address from accessing to specific port in the switch
RADIUS Supports RADIUS authentication switch as a client
TACACS+ Up to 5 TACACS+ servers are supported
Storm Control
Prevents traffic on a LAN from being disrupted by a broadcast, multicast, or unicast
storm on a port
DHCP Snooping
A feature acts as a firewall between untrusted hosts and trusted DHCP servers
Loop Protection
Prevents unknown unicast, broadcast, multicast loops in Layer 2 switching.

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Quality of Service (QoS)
Hardware Queue
Supports 8 hardware queues
Scheduling

Strict priority and weighted round-robin (WRR)

Queue assignment based on DSCP and class of service
Classification

Port based
802.1p VLAN priority based
Rate Limiting

Ingress policer
Egress shaping and rate control
Per port
Management
Port Mirroring
Traffic on a port can be mirrored to another port for analysis with a network analyzer or
RMON probe. Up to N-1 (N is Switch’s Ports) ports can be mirrored to a single
destination port. A single session is supported.
IEEE 802.1ab
(LLDP)
Used by network devices for advertising their identities, capabilities, and neighbors on an
IEEE 802ab local area network. Support LLDP-MED extensions.
Web GUI Built-in switch configuration utility for browser-based device configuration
Dual Image
Independent primary and secondary images for backup while upgrading
UPnP
Universal Plug and Play enables device-to-device interoperability
DHCP Server
Support DHCP server to assign IP to DHCP clients
SNMP
SNMP v1, v2c, v3 with traps, and SNMP v 3 user-based security model (USM)
Firmware Upgrade
Web browser upgrade (HTTP/ HTTPs) and TFTP
NTP
Network Time Protocol (NTP) is a networking protocol for clock synchronization between
computer systems over packet-switched
Other Management HTTP/HTTPs; DHCP Client; Cable Diagnostics; Syslog; IPv6 Management; SMTP
Device Management System (DMS)
Graphical
Monitoring
Topology view: Support
intuitive way to configure and manage switches and devices with
visual relations.
Floor view: Easily drag and drop PoE devices and help you to build smart workforces.
Map view: Efficiently drag and drop devices and monitor surroundings on Google maps.
Find My Switch
The front panel LEDs flash for 15 seconds to visually identify the switch.
Traffic Monitoring Display visual chart of network traffic of all devices and monitor every port at any time.
Troubleshooting
Network diagnostic between master switch and devices. Supports protection mechanism,
such as rate-limiting to protect your devices from brute-force downloading.
Power over Ethernet (PoE)
Port Configuration Supports per port PoE configuration function
PoE Scheduling
Supports per port PoE scheduling to turn on/off the PoE powered devices (PDs).
Auto Power Reset
Automatically checks the link status of PDs, and reboots PDs if there are no responses.
Power Delay
The switch provides power to the PDs based on delay time when PoE switch boots up, in
order to protect switch from misuse of the PDs

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Power Consumption
DC power consumption measured after 60 minutes under full loading with wire speed forwarding.
DC 52V Input:
Device Status Device Interface
DC Current
Consumption
(A)
DC Voltage
(V)
DC Power
Consumption
(W)
BTU/Hr.
Non-loading
None
0.11
52
5.72
19.51
PoE Standby
Mode
1G TP Port x8
1G SFP Port x2
2.66 52 138.32 471.67
PoE Full loading
after 60 minutes
1G TP Port x8
1G SFP Port x2
2.66 52 138.32 471.67
Non- PoE
Standby Mode
1G TP Port x8
1G SFP Port x2
0.17 52 8.84 30.14
Non-PoE Full
loading after 60
minutes
1G TP Port x8
1G SFP Port x2 0.17 52 8.84 30.14
DC 54V Input:
Device Status Device Interface
DC Current
Consumption
(A)
DC Voltage
(V)
DC Power
Consumption
(W)
BTU/Hr.
Non-loading
None
0.11
54
5.94
20.26
PoE Standby
Mode
1G TP Port x8
1G SFP Port x2
2.58 54 139.32 475.08
PoE Full loading
after 60 minutes
1G TP Port x8
1G SFP Port x2
2.59 54 139.86 476.92
Non- PoE
Standby Mode
1G TP Port x8
1G SFP Port x2
0.17 54 9.18 31.30
Non-PoE Full
loading after 60
minutes
1G TP Port x8
1G SFP Port x2 0.17 54 9.18 31.30

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Front and Back Panels
The SM8TAT2SA-DC front and back panels are shown and described below.
Front Panel
The SM8TAT2SA-DC front panel provides the switch LEDs, ports, and MODE/RESET pushbutton switch.
Back Panel
The SM8TAT2SA-DC back panel provides the +52 to +54VDC or -52 to -54VDC power input connection.

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LED Descriptions
The LEDs on the front panel provide switch status checking and
monitoring. The types of LEDs are as follows:
System LED
Indicates if the switch is powered up correctly, indicates if there is a
system alarm triggered for troubleshooting.
Mode LEDs
Indicate the mode of all ports on the switch. You can press the MODE/RESET button sequentially to switch
between the two modes (Link/Activity/Speed mode and PoE mode).
Port Status LEDs
Indicate the current status of each port. You can check these LEDs to understand the port status in different
modes, after changing the mode by pressing MODE/RESET button.
The LED indicators are described in the following tables.
Table 1: System LED
LED Color State Description
System
Green
On The switch is powered ON correctly.
Off The switch is not receiving power.
Red On An abnormal state, such as exceeding operating temperature
range, was detected in the switch.
Table 2: Mode LEDs
LED Color State Description
Link/Act/Speed Green On The Port Status LEDs display link status, network activity, and
speed of each port.
PoE Green On The RJ45 Port Status LEDs are displaying PoE powering
status of each port.

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By pressing the MODE/RESET button for less than 2 seconds to change LED modes (Link/Act/Speed Mode or
PoE Mode) you can check the port status by reading the LED behaviors per the table below.
Table 3: Port Status LEDs
When Link/Act/Speed Mode LED Lit
LED Color State Description
RJ45 Ports
Green On
The port is enabled and established a link to connected device, and
the connection speed is 1000Mbps.
Green Blinking
The port is transmitting/receiving packets, and the connection speed is
1000Mbps.
Amber On
The port is enabled and established a link to connected device, and
the connection speed is 10/100Mbps.
Amber Blinking
The port is transmitting/receiving packets, and the connection speed is
10/100Mbps.
-- Off
The port has no active network cable
connected, or it is not established
a link to connected device. Otherwise, the port may have been
disabled through the switch user interface.
SFP Ports
Green On
The port is enabled and established a link to connected device, and
the connection speed is 1000Mbps.
Green Blinking
The port is transmitting/receiving packets, and the connection speed is
1000Mbps.
Amber On
The port is enabled and established a link to connected device, and
the connection speed is 100Mbps.
Amber Blinking
The port is transmitting/receiving packets, and the connection speed is
100Mbps.
-- Off
The port has no active network cable connected, or it is not established
a link to connected device. Otherwise, the port may have been
disabled through the switch user interface.
RJ45 Ports and LEDs SFP Ports and LEDs

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When PoE Mode LED Lit
LED
Color
State
Description
RJ45 Ports
Green On The port is enabled and supplying power to connected device.
Amber On An abnormal state, such as overload status, has been detected in the
switch.
-- Off
The port has no active network cable connected, or it is not connected a
PoE PD device. Otherwise, the port may have been disabled through the
switch user interface.
MODE/RESET Button
Pressing the front panel MODE/RESET button for a period of time lets you perform these tasks:
•Change Port Status LED Mode: to read the port status correctly
in the two different modes (Link/Act/Speed mode or PoE mode).
•Reset the Switch: to reboot and get the switch back to the
previous configuration settings saved. Note that there is also a
Non-Stop PoE (soft reboot) feature allows the switch to reboot
without affecting PoE port power via the Web UI or CLI.
•Restore the Switch to Factory Defaults: to restore the original
factory default settings back to the switch.
Note: Use the table below to determine which task is being performed by reading the LED behaviors while
pressing and holding the MODE/RESET button. When the LED behavior displays correctly, release the button.
Table 4: MODE/RESET Button Descriptions
Task to Perform Press Button for SYS LED Behavior Port Status LED Behavior
Change LED Mode 0 ~ 2 seconds On Green LED status will change based on the
mode selected.
Reset the Switch 2 ~ 7 seconds Blinking Green ALL LEDs Off.
Restore to Defaults 7 ~ 12 seconds Blinking Green ALL LEDs stay On.
Press the Reset button until all port LEDs light, then release the Reset button. This will set the unit back to its
factory default IP address; log back in to display the startup wizard (First Time Wizard).

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Installation
This section describes switch mounting, grounding, cable connection, configuration, and power connection.
Caution: Before proceeding make sure you have read “Power Supply Warnings & Cautions !!“on page 23.
Package Checklist
Verify that the box contains the following items:
□ One Ethernet Switch
□ Two Rack Mount brackets
□ Four rubber feet
□ One printed Quick Start Guide
□ One documentation postcard
Contact you sales representative if you have not received these
items. Save the packaging for possible future use.
Rack Mount Safety Instructions
The instructions below (or similar) are intended for rackmount installation environments:
1. Elevated Operating Ambient: if installed in a closed or multi-unit rack assembly, the operating ambient
temperature of the rack environment may exceed room ambient. Install the equipment in an environment
compatible with the maximum ambient temperature (Tma) specified.
2. Reduced Air Flow: install the equipment in a rack so that the amount of air flow required for safe operation is
not compromised.
3. Mechanical Loading: Mount the equipment in the rack so that a hazardous condition does not occur due to
uneven mechanical loading (weight distribution/rack balance).
4. Circuit Overloading: give consideration to the connection of the equipment to the supply circuit and the effect
that overloading of the circuits might have on overcurrent protection and supply wiring. Consider all
equipment nameplate ratings when addressing this concern.
5. Reliable Earthing: maintain reliable earthing of rack-mounted equipment; pay particular attention to supply
connections other than direct connections to the branch circuit (e.g., use of power strips).
6. It is your responsibility to ensure that the final combination of equipment and rack complies with all applicable
safety standards and local electric code requirements.

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Rack Mount Dimensions
SM8TAT2SA-DC with Rack Mount Brackets
Rack Mount Brackets

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Rack Mounting
1. Attach the mounting brackets to both sides of the chassis. Insert screws and tighten then with a screwdriver to
secure the brackets.
2. Place the switch in the rack. Align the oval holes in the brackets with the mounting holes in the rack posts.
3. Attach the brackets to the posts. Insert screws and tighten them.
Wall Mounting
Step 1: Install user-supplied screws on the appropriate location on the wall and be aware of the dimensional
limitation of the screws.
Install screws to the wall Attaching switch to the wall
Step 2: Make sure that the switch is attached securely to wall.

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Mounting the Switch on Desk or Shelf
Step 1: Verify that the workbench is sturdy and reliably grounded.
Step 2: Attach the four adhesive rubber feet to the bottom of the switch.
Attaching the Rubber Feet
Grounding
The back panel provides a ground screw. After the Switch is mounted and connected, the grounding screw can
be used for grounding. Grounding and wire routing help limit the effects of noise due to EMI (electromagnetic
interference). Note: Run the ground connection from the ground screw to the grounding surface before
connecting devices.
Refer to IEC 60417 for Graphical Symbols definitions. Refer to IEC 50 [3] for terminology definitions.
See ITU-T K.27 for Bonding configurations and earthing inside a telecommunications building.
See GR-1089-CORE for Electromagnetic compatibility and electrical safety—generic criteria for network
telecommunications equipment.